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钻孔灌注桩由于对各种地质条件的适应性、施工简单、容易操作且设备投入一般不是很大,因此很多大中小桥都采用钻孔灌注桩为基础。钻孔灌注桩的施工大部分是在水下进行的,其施工过程无法观察,成桩后也不能进行开挖验收。施工中的任何一个环节出现问题,都将直接影响整个工程的质量和进度,甚至给投资者造成巨大经济损失和不良社会影响。因此必须防治在钻孔过程中及水下混凝土灌注过程中经常出现的施工质量问题,保质、保量地完成桩基施工生产任务。
Because of its adaptability to various geological conditions, the bored piles are simple and easy to operate, and their investment in equipment is generally not very large. Therefore, many bridges are based on bored piles. Most of the construction of bored piles is carried out underwater, the construction process can not be observed, after the pile can not be carried out excavation acceptance. Any one part of the construction problems, will directly affect the quality and progress of the entire project, and even cause huge economic losses to investors and adverse social impact. Therefore, it is necessary to prevent and control the construction quality problems frequently encountered in the process of drilling and in the process of underwater concrete pouring, so as to complete the pile foundation construction and production tasks of quality and quantity.